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10 Health Benefits of Spirulina Capsules

Spirulina Capsules
Spirulina Capsules - Dietary Supplement

Once declared the “best food for the future” by the World Health Organization, this blue-green algae are a protein-rich antioxidant that may support and maintain your immune system.

What Is Spirulina?

Spirulina is a dried supplement made from two species of blue-green algae, Arthrospira platensis and Arthrospira maxima. The Kanembu tribe in Chad call it dihé; the Aztecs who lived in the valley of Mexico called it tecuitlatl.

The algae naturally grow in warm freshwater lakes like Lake Texcoco in Mexico and Lake Chad, which sits on the border of Chad, Niger, Nigeria, and Cameroon. Locals traditionally harvest the algae and dry it in “cakes”.

Once it’s been dried, spirulina contains up to 70% protein, is a nutrient-rich antioxidant, and takes less land, water, and energy to produce than staple crops like corn and soy. Farmers use it to enrich their animal feeds and improve the quality of meat they produce. It pulls huge quantities of carbon dioxide out of the atmosphere, and it may even be used to convert city sewage back to clean water [1, 5].

Spirulina gathered attention as a possible pharmaceutical in the 1940s and 50s. In 1974, the World Health Organization declared it the “best food for the future” to combat malnutrition, especially in children.

Snapshot of Spirulina


Powerful antioxidant.

High in protein and full of nutrients.

May reduce the risk of heart disease.

May reduce inflammation, especially in allergies, and boost immunity.

May lower blood sugar.

May possibly prevent fatigue.

May protect the liver, brain, and kidneys.


Some potential benefits have been insufficiently investigated.

May cause rare allergic reactions.

Occasional contamination with other cyanobacteria.

May interact with some medication.

Health Benefits of Spirulina:

Effective For:-

1) Antioxidant Activity

When free radicals build up, they disrupt structures, machinery, and even DNA inside cells. This process is linked to a great many diseases, including cancer, Alzheimer’s disease, Parkinson’s disease, and arthritis.

The most robust benefit of Spirulina capsules is probably its antioxidant effect. Multiple cell, animal, and human studies have demonstrated its ability to reduce oxidative stress; furthermore, spirulina contains diverse active compounds with antioxidant activity. It may contribute to whole-body health and, when combined with diet and lifestyle choices, delay or prevent disease onset.

Likely Effective For:-

2) Heart Health

A review of 12 human clinical studies suggested that Spirulina may protect the heart not only through its antioxidant properties, but also by lowering cholesterol, triglycerides, and blood pressure.

Blood Pressure

Multiple clinical studies revealed that Spirulina lowers blood pressure. In particular, the diastolic blood pressure – the lower of the two numbers, measured when the heart is resting between beats – is significantly decreased in people taking spirulina supplements.

Cholesterol and Triglycerides

High levels of cholesterol and triglycerides increase a person’s risk of heart disease and stroke.

In animal and human studies, Spirulina decreased total cholesterol, LDL (the “bad” cholesterol), and triglycerides in the blood. These markers may increase as we age; Spirulina may, therefore, have key benefits in elderly people or in those prone to high levels.

Possibly Effective For:-

3) Inflammation

Inflammation, like oxidative stress, is linked to many different conditions. Inflammatory diseases include everything from depression to IBD to arthritis.

Spirulina contains multiple bioactive compounds that are known to reduce inflammation. Taken as a supplement, Spirulina blocks the activity of molecules that stimulate the inflammatory response. In both human and rat studies, it reversed an age-related increase in inflammatory cytokines.

In Allergic Rhinitis

Allergic rhinitis is the most common allergic reaction to environmental allergens like pollen; it is also a major part of asthma. In one clinical study on 150 people, Spirulina decreased all measured symptoms of allergic rhinitis compared to placebo.

4) Boosting Immunity

Animal and human studies have demonstrated Spirulina’s immune-boosting properties. By activating white blood cells and the tissues that produce them, it may help the body defend against bacteria, viruses, and even tumours without causing excessive inflammation.

In a clinical trial on 169 HIV-infected people, daily supplementation with Spirulina (along with a balanced diet) increased the levels of immune cells (CD4) and reduced the viral load after 6 months.

Spirulina reduced viral load and liver damage in a trial on 30 people with hepatitis C.

Spirulina extract improved natural killer cell activity in 2 small trials on14 healthy people.

In a trial on 19 rowers, supplementation with Spirulina protected against the deficit in immune function caused by strenuous exercise.

5) Lowering Blood Sugar

We need sugar to keep a supply of energy available for our bodies, but high blood sugar can lead to insulin resistance and diabetes. In a review of 12 clinical studies, Spirulina significantly reduced fasting blood glucose. Clinical studies suggest it may also increase sensitivity to insulin. Each person’s health status (and possibly race) may affect their response to Spirulina.

6) Fatigue

Spirulina may improve exercise output and prevent fatigue. In a study of 18 adult men, both short- and long-term, Spirulina supplementation slightly, but significantly improved exercise output and reduced both physical and mental fatigue.

In a second, limited study of only nine “moderately trained” adult men, it improved markers of physical endurance. The evidence for this effect is limited, but promising.

7) Chronic Arsenic Poisoning

Arsenic is an element found naturally in very low levels in the environment and in much higher concentrations in (now banned) pesticides and wood preservatives. In some parts of the world, people are exposed to low levels of arsenic in their drinking water and suffer chronic poisoning as a result.

In a human trial on 41 people, Spirulina and Zinc supplements improved symptoms of arsenic poisoning. People taking the supplements cleared more arsenic in their urine and had less arsenic in their tissues.

8) Liver Support

In a limited human study of three people, 4.5 g/day of Spirulina lowered blood cholesterol and triglyceride levels and improved symptoms of fatty liver disease, indicating it might be helpful in people with this disease. Unsurprisingly, one of the reasons why Spirulina may support liver function is tied to its antioxidant property. In diabetic rats, Spirulina protected liver tissues against oxidative stress and improved markers of liver function.

Spirulina may also protect the liver from damage caused by a high-fat diet, as demonstrated in rats. It may also protect the liver from age-related inflammation by optimizing the gut microbiome.

9) Protecting the Brain

Too much iron in the brain increases oxidative stress, damages neurons, and may trigger a cognitive decline. Spirulina’s antioxidant effects may reverse this stress. Likewise, Spirulina decreased harmful inflammation in microglial cells, which is thought to underlie diseases like Alzheimer’s.

In one cell-based study, an extract of Spirulina prevented neuron death by increasing a signalling pathway involving BDNF and CREB – both of which protect neurons from damage and maintain brain function and flexibility during stress.

10) Kidney Support

Many commonly used drugs are excreted by the kidneys. This work taxes the kidneys and exposes them to damage. Similarly, in people with diabetes, the kidneys struggle under an increased oxidative load. Spirulina’s antioxidant properties prevent oxidative stress in the kidney; in animals, Spirulina supports the kidneys while they process medication and filter toxins out of the blood.

Many of the health benefits of Spirulina have only been tested in cell or animal studies. Given how promising these early studies have been, many more human clinical trials are probably on the horizon which will undoubtedly change our understanding of its mechanisms.

Supplementation & Dosage

Spirulina is available in powder, pill, capsule, and liquid extract. Traditionally, it has also been eaten as a dried “cake.” All Spirulina supplements are made from the biomass of the whole organism:

Make sure to buy a high-quality supplement that lists only pure Spirulina on the label.


Because spirulina is not approved by the FDA for any conditions, there is no official dose. Users and supplement manufacturers have established unofficial doses based on trial and error. Discuss with your doctor if spirulina may be useful as a complementary strategy in your case and which dose you should take. Clinical studies have used a range of doses to investigate Spirulina’s effects. People have seen beneficial effects from as little as 400 mg per day.

Toxicological studies show that Spirulina is very well tolerated; rats fed Spirulina as nearly half of their complete diet had no chronic negative effects. You may wish to start at a lower dose and increase it slowly.

Pet Food Supplement

As more and more people move away from commercial kibble diets for their pets, pet owners are looking for nutritious supplements and additives to keep their dogs and cats in top condition. Spirulina is a popular supplement for pets on a homemade raw diet.

Only one study has investigated the effect of Spirulina on dogs; this study found that Spirulina polysaccharides protected the bone marrow from damage caused by chemo- and radiotherapies. In one cat study, Spirulina increased the activity of immune cells. Because of its excellent safety profile and history of animal feeding, Spirulina is considered safe to feed to dogs and cats.

In dog diets, Spirulina is used as a source of vitamins, iodine, and trace minerals. It should only be used as a supplement and not as a primary protein source.

Most online user reviews for Spirulina supplements are positive. People reported having more energy, lower cholesterol, increased physical performance, and fewer infections.


You can purchase the highest grade, organic Spirulina Capsules HERE.


The information on this website has not been evaluated by the Food & Drug Administration or any other medical body. We do not aim to diagnose, treat, cure or prevent any illness or disease. Information is shared for educational purposes only. You must consult your doctor before acting on any content on this website, especially if you are pregnant, nursing, taking medication, or have a medical condition.


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